remedial

a body chemical that develops a sense of pleasure

that improves the way you feel

a body chemical that relieves pain and develops a sense of happiness

to hypothesise

only

that brings a feeling of enjoyment

bringing about changes for the better

spreading quickly

influence

one-of-a-kind

the gradual development of humankind

an ape

in all probability

unconnected

genuineness

irrespective of anything

vital

(phr) to make sb feel happier or better than before

(phr) without considering anything else

(phr) to put up with sth you don't like, with a good attitude, rather than complain about it

the natural ability to keep doing sth without giving up

the way you feel

getting better after being ill

to "catch" an illness

not traditional medical treatment

medical treatment without operating on the body

continuing medical treatment

a friendly frame of mind

a very bad fame of mind

a negative frame of mind

getting better after an illness in a short period of time

an incurable illness continuing for a long time

an illness that leads to death

an illness that is gradually getting worse